eng Science and Education Publishing International Journal of Physics 2333-4576 2024-04-16 12 2 77 82 10.12691/ijp-12-2-3 IJP20241223 article Gbal¨¦ G. K. Jean-Christophe gbalechristophe@yahoo.fr 1 Adon A. Marcellin 2 Koua A. Antonin 2 Laboratory of Material Sciences, Environment, and Solar Energy, University F¨¦lix Houphouet-Boigny, Abidjan, C?te d¡¯Ivoire Laboratory of Environment Sciences and Technologies, University Jean-Lorougnon Gu¨¦d¨¦, Daloa, C?te d¡¯Ivoire Monitoring of radionuclides in aerosols is essential for understanding the factors influencing temporal variations in atmospheric deposition of elements such as 210Pb, which is frequently used as a tracer in atmospheric studies. However, long-term monitoring remains limited. Very few studies on air radioactivity are available in Africa and particularly in Côte d'Ivoire. In this study, we measured the radioactivity of 210Pb in surface aerosols collected on a weekly basis in the city of Abidjan in southeastern Côte d'Ivoire from March 2022 to February 2023, using HPGe gamma spectrometry. The mean activity of 210Pb was 0.78 ± 0.2 mBq/m3. This activity concentration showed strong seasonal variations, with maximum concentrations recorded during the dry seasons and minimum in the rainy seasons. Statistically significant correlations were observed between 210Pb concentration and temperature (r = 0.47; p-value = 0.02), as well as a negative correlation with precipitation (r= -0.48; p-value = 0.02). A statistical test comparing the data obtained in the present work with some bibliographic values of 210Pb in aerosols showed that our level of activity concentration is statistically identical to the other previous studies carried out in the world. The active dependence of 210Pb with temperature and precipitation was investigated through simple linear regression analysis. Model evaluation and comparison functions were also used. Overall, this study provides an understanding of the behavior, correlations and variability of observed 210Pb concentrations influenced by atmospheric conditions in our study area. https://pubs.sciepub.com/ijp/12/2/3/ijp-12-2-3.pdf ²¹⁰Pb Aerosol Coastal city Environmental radioactivity